第八天：对象图导航语言

来源：互联网发布：男王升级数据编辑：程序博客网时间：2024/06/05 12:47

1、Strust 取值 EL 取值

#attr.age ${age}

#request.age ${requestScope.age}

#session.age ${sessionScope.age}

#application.age ${applicationScope.age}

2、取值标签:

<s:property value="#request.age"/> 相当于 <c:out/>

<s:property value="#request.age" default="默认值"/> 当取的之不存在时，显示默认值

<s:property value="#request.age" escapeHtml="false"/> 格式化输出html

3、判断标签：

<s:if test=""(判断条件)></s:if>

<s:elseif test="" ></s:elseif>

<s:elseif test=""></s:elseif>

<s:else></s:eles>

3、迭代标签：

<s:iterator value="#request.list" var="list" status="n">

<s:property value="#list"/><br/>

</s:iterator>

4、常用UI标签：

<s:date name="#request.now"  format="yyyy年MM月dd日--HH时mm分ss秒"/>   <s:form method="post" action="">   <s:textfield name="user.username" label="用户" ></s:textfield>   <s:password name="user.userpassword" label="密码"></s:password>   <s:radio list="{'男','女'}" name="user.usersex" label="性别"></s:radio>   <s:radio list="#{1:'男',2:'女'}" name="user.usersex" label="性别2"></s:radio>   <s:checkboxlist list="{'睡觉','吃饭','打游戏','听音乐'}" label="爱好" name="user.userlover"></s:checkboxlist>   <s:checkboxlist list="#{1:'睡觉',2:'吃饭',3:'打游戏',4:'听音乐'}" label="爱好" name="user.userlover"></s:checkboxlist>   <s:select list="{'遵义','西安','杭州','苏州','云南'}" name="user.useraddress" label="籍贯"></s:select>   <s:select list="#{1:'遵义',2:'西安',3:'杭州',4:'苏州',5:'云南'}" name="user.useraddress" label="籍贯"></s:select>   <s:submit value="提交"></s:submit>   </s:form>    <hr/><s:optiontransferselect     label="Favourite Cartoons Characters"     name="leftSideCartoonCharacters"     list="{'Popeye', 'He-Man', 'Spiderman'}"     doubleName="rightSideCartoonCharacters"     doubleList="{'Superman', 'Mickey Mouse', 'Donald Duck'}"  />

5、防止表单重复提交

jsp界面：

<s:form method="post" action="login">          <s:token></s:token>//防止表单重复提交核心标签          <s:textfield name="user.userName" label="用户"></s:textfield>          <s:password name="user.userPass" label="密码"></s:password>          <s:submit value="注册"></s:submit></s:form>

配置文件：

<action name="login" class="com.liu.action.LoginAction">      <result>/success.jsp</result>      <result name="invalid.token">/demo.jsp</result>      <interceptor-ref name="token"></interceptor-ref>//使用token拦截器验证是否重复提交      <interceptor-ref name="defaultStack"></interceptor-ref></action>

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